Swivel-hook for ornamental chains



(No Model.)

D. P. BRIGGS.

SWIVEL HOOK FOR ORNAMENTAL CHAINS.

No. 299,336. Patented Ma 27, 1884..

NITED STATES,

tribe.

PATEN DANIEL F. BRIGGS, 0F ATTLEBOROUGH, MASSACHUSETTS.

SWIVEL-HOOK FOR ORNAMENTAL CHAINS.

SPECIFICATION forming part of Letters Patent No. 299,336, dated May 2'7, 1884:.

Application filed September 20, 1883. (No model.)

To all whom it may concern.-

Be it known that I, DANIEL F. BRIGGS, of Attleborough, in the State of Massachusetts, have invented an Improvement in Swivel- Hooks for Ornamental Chains, of which the following is a specification.

My invention relates to an improvement in that class of swivels in which a curved hook is combined with a sliding spring-bolt; and the object of my improvement is to provide against liability of losingthe spring bolt in case of the accidental bending or straighten ing of the hook 5 and it consists in providing the sliding bolt with a fixed safety-stop separate and independent of the end of the hook, which has alone been heretofore employed for stopping the bolt.

Figure 1 represents an'elevation of a swivelhook provided with my improvement. Fig. 2 is an axial section of the same. Figs. 3and 4. are detail views illustrating the construe tion of parts of the swivel-hook. Fig. 5 is a section showing a straightened book.

In the accompanying drawings, A is the swivel-ring, made to turn loosely upon the tubular stem 13, which extends from the hollow barrel 0 of the swivel, to which is secured the fixed hook D, the outer end of which is made to abut against the corresponding end of the bolt E, and the bolt Eis provided at its inner side with the shoulder d, which serves to form a safety-stop by striking against the inner side of the larger perforated end of the barrel 0 in case of the accidental bending or straightening of the hook, as shown in Fig. 5. Upon the stem a of the bolt E is placed the spiral spring F, which operates to throw the bolt outward through the perforation 9, made in the larger end of the barrel 0, to receive the bolt.

In manufacturing my improved swivel-hook the barrel 6 is first formed with a turned-up lip, I), as shown in Fig. 3, which, after the insertion of the bolt E, is to be turned down to form a safety-stop with the shoulder cl of the bolt. The belt E is provided with the pro jecting lip c, by means of which the bolt may be thrown back in order to permit the inscrtion of a stem-ring within the hook.

I do not of courselimit my claim to the particular form and location of the stop-shoulder (1, (shown in the drawings,) for the reason that the safety-stop may be formed in various ways, and may be located at either end of the shank a of the belt.

I claim as my invention 1. In a swivel-hook for ornamental chains, the combination of the barrel, the swivel-ring, and the fixed hook, the end of which serves to form a stop for a spring-bolt, with the spring and bolt provided with a safety-stop adapted to prevent the loss of the bolt in case of the accidental bending of the hook, substantially as described.

2. In a swivel-hook for ornamental chains, the combination of the barrel 0, provided with the lip cl, swivel-ring A, and fixed hook D, with the spring F and bolt E, provided with the shoulder d, adapted to form a safety-stop, substantially as described.

DANIEL F. BRIGGS. Vitnesses: SOCRATES ScHoLFrnLn, JOHN S. LYNCH. 

